TWI823301B - Method for zooming visual content, host, and computer readable medium - Google Patents

Abstract

The embodiments of the disclosure provide a method for zooming a visual content, a host, and a computer readable medium. The method includes: detecting a first wink movement of a first eye of a user and detecting a second wink movement of a second eye of the user; in response to determining that the first wink movement matches a first predetermined wink movement but the second wink movement fails to match a second predetermined wink movement, zooming in the visual content; and in response to determining that the second wink movement matches a second predetermined wink movement but the first wink movement fails to match the first predetermined wink movement, zooming out the visual content.

Description

Method, host, and computer-readable storage medium for scaling visual content

The present invention relates to a visual content adjustment mechanism, and in particular, to a method, a host, and a computer-readable storage medium for scaling visual content.

Today, viewing visual content (eg, virtual reality (VR) content) provided by devices such as head-mounted displays (HMDs) has become a common activity for people. When interacting with visual content, users may need to zoom in/out of the visual content from time to time to achieve better interaction.

Traditionally, users can zoom in and out of visual content through methods such as two-finger dragging and/or movement of certain handheld controllers, which may interfere with the user's immersive experience.

Therefore, it is crucial to provide a design that allows users to scale visual content in an easier and more intuitive way.

In view of this, the present invention relates to a method, a host, and a computer-readable storage medium for scaling visual content that can be used to solve the above technical problems.

Embodiments of the present invention provide a method for scaling visual content suitable for a host. The method includes: detecting a first blink movement of the user's first eye and detecting a second blink movement of the user's second eye; and responding to determining that the first blink movement matches a first predetermined blink movement but the the second blink movement does not match a second predetermined blink movement, amplifying the visual content; and in response to determining that the second blink movement matches a second predetermined blink movement but the first blink movement does not match the first predetermined blink Movement, narrowing down said visual content.

Embodiments of the present invention provide a host including a storage circuit and a processor. The storage circuit stores program code. The processor is coupled to the non-transitory storage circuit and accesses the program code to perform: detecting a first blinking movement of the user's first eye and detecting a second blinking movement of the user's second eye; amplifying the visual content in response to determining that the first blink movement matches a first predetermined blink movement but that the second blink movement does not match a second predetermined blink movement; and in response to determining that the second blink movement matches a second predetermined blink movement A blinking motion but the first blinking motion does not match the first predetermined blinking motion, shrinking the visual content.

Embodiments of the present invention provide a non-transitory computer-readable storage medium. The computer-readable storage medium records an executable computer program. The executable computer program is loaded by a host to perform the following steps: detecting the user's first the first blinking movement of the eye and detecting the second blinking movement of the user's second eye; in response to determining that the first blinking movement matches the first predetermined blinking movement but the second blinking movement does not match the second predetermined blinking movement , enlarging the visual content; and responsive to determining that the second blink motion matches a second predetermined blink motion but the first blink motion does not match the first predetermined blink motion, zooming out the visual content.

Referring to Figure 1, Figure 1 shows a schematic diagram of a host according to an embodiment of the present invention. In various embodiments, the host 100 may be any electronic device, such as a smart device and/or a computer device. In some embodiments, the host 100 may be a reality system (eg, a virtual reality (VR) system, an augmented reality (AR) system, a mixed reality (MR) system, etc. ) HMD. In some embodiments, the host 100 may be an (integrated) HMD that provides visual content (eg, VR content) for the user/wearer to view, but the invention is not limited thereto.

In some embodiments, the host 100 may be configured with an eye tracking circuit, which may be used to track eye movements of the user's two eyes (eg, eye closing movements and/or blinking movements, etc.). In one embodiment, the host 100 may be configured with a camera for capturing images of the user's eyes, and the host 100 may determine eye movements of the user's eyes by analyzing the captured images.

In FIG. 1 , host 100 includes storage circuitry 102 and processor 104 . The storage circuit 102 is one of fixed or removable random access memory (RAM), read-only memory (ROM), flash memory, a hard disk, or any other similar device, or They are combined and record code and/or modules that are executable by the processor 104 .

The processor 104 is coupled to the storage circuit 102, and the processor 104 may be, for example, a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, and a DSP core. Associated one or more microprocessors, controllers, microcontrollers, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Array (FPGA) circuits, or any other Types of integrated circuits (ICs), state machines, etc.

In an embodiment of the present invention, the processor 104 accesses modules and/or program codes stored in the storage circuit 102 to implement the method for scaling visual content provided in the present invention, which will be further discussed below. .

Referring to FIG. 2, FIG. 2 shows a flowchart of a method for scaling visual content according to an embodiment of the present invention. The method of this embodiment can be executed by the host 100 in Figure 1, and the details of each step in Figure 2 will be described below supplemented by the components shown in Figure 1.

In step S210, the processor 104 detects a first blinking movement of the user's first eye, and detects a second blinking movement of the user's second eye. In embodiments of the invention, the first eye may be one eye of the user, and the second eye may be the other eye of the user. As described above, the host 100 can track the eye movements of each eye of the user. In one embodiment, in response to determining that the user's eye has blinked, the processor 104 may determine that the eye has performed a blinking motion. In one embodiment, in response to determining that the eye has closed and opened (within a specific duration), the processor 104 may determine that the eye has performed a blinking motion, although the invention is not limited thereto.

In an embodiment of the present invention, the processor 104 determines whether the first blink movement matches the first predetermined blink movement, and determines whether the second blink movement matches the second predetermined blink movement.

In one embodiment, in response to determining that the first blink movement matches the first predetermined blink movement, but the second blink movement does not match the second predetermined blink movement, the processor 104 performs S220 to amplify the visual content.

In another embodiment, in response to determining that the second blink movement matches the second predetermined blink movement, but the first blink movement does not match the first predetermined blink movement, the processor 104 performs S230 to zoom out the visual content.

In the first embodiment, the processor 104 determines whether the first eye blinks a first predetermined number of times within a first predetermined duration. In response to determining that the first eye blinked a first predetermined number of times within a first predetermined duration, processor 104 determines that the first blink motion matches the first predetermined blink motion.

In the first embodiment, the first predetermined number of times is two times, and the first predetermined duration is one second, but the invention is not limited thereto. In this case, if the processor 104 determines that the user's first eye blinked twice within one second, the processor 104 may determine that the first blink movement of the first eye matches the first predetermined blink movement, However, the present invention is not limited to this. In detail, since the normal blink/blink rate of humans is about 0.26 times/second, if it is determined that the first eye blinks twice in one second (which is significantly higher than the normal blink/blink rate), then it means The user wants to initiate a specific action (e.g., zoom in on visual content) by using the first eye.

In a first embodiment, the second predetermined blink movement may be the same as the first predetermined blink movement. In this case, the processor 104 determines whether the second eye blinks the first predetermined number of times within the first predetermined duration. In response to determining that the second eye blinked the first predetermined number of times within the first predetermined duration, the processor 104 determines that the second blink motion matches the second predetermined blink motion. That is, if the processor 104 determines that the user's second eye blinked twice within one second, the processor 104 may determine that the second blink movement of the second eye matches the second predetermined blink movement, but the present invention Not limited to this. Similar to the principles mentioned above, if it is determined that the second eye blinks twice within one second, it indicates that the user wants to initiate a specific operation (for example, zooming out visual content) by using the second eye.

In some embodiments, the second predetermined blink movement may be designed to be different from the first predetermined blink movement. For example, when it is determined that the second eye blinks three times within two seconds, the processor 104 may determine that the second blink movement matches the second predetermined blink movement, but the invention is not limited thereto.

In a second embodiment, the processor 104 determines whether the first eye has been closed for a first predetermined length of time. In response to determining that the first eye has been closed for a first predetermined length of time, processor 104 determines that the first blink motion matches the first predetermined blink motion. In a second embodiment, the first predetermined length of time is two seconds. In this case, if the processor 104 determines that the user's first eye has been closed for two seconds, the processor 104 may determine that the first blink movement of the first eye matches the first predetermined blink movement, but the invention is not limited thereto. this. In detail, since the normal blinking/blinking rate of humans is about 0.26 times/second, if it is determined that the first eye is closed for two seconds (which is significantly lower than the normal blinking/blinking rate), then it means that the user wants to To initiate a specific action (for example, magnifying visual content) by using the first eye.

In a second embodiment, the second predetermined blink movement may be the same as the first predetermined blink movement. In this case, the processor 104 determines whether the second eye has been closed for the first predetermined length of time. In response to determining that the second eye has been closed for the first predetermined length of time, processor 104 determines that the second blink motion matches the second predetermined blink motion. That is, if the processor 104 determines that the user's second eye has been closed for two seconds, the processor 104 may determine that the second blink movement of the second eye matches the second predetermined blink movement, but the invention is not limited thereto. Similar to the principles mentioned above, if it is determined that the second eye is closed for two seconds, it indicates that the user wants to initiate a specific operation (for example, zooming out visual content) by using the second eye.

In some embodiments, the second predetermined blink movement may be designed to be different from the first predetermined blink movement. For example, when it is determined that the second eye has been closed for three seconds, the processor 104 may determine that the second blink movement matches the second predetermined blink movement, but the invention is not limited thereto.

In the third embodiment, the processor 104 determines whether the first blink movement and the second blink movement together form a specific blink movement. In response to determining that the first blink motion and the second blink motion together form a specific blink motion, the processor 104 scales the visual content at a predetermined magnification of the visual content. That is, regardless of the magnification ratio to which the visual content has been enlarged/zoomed out, the processor 104 may scale the visual content back to the predetermined magnification ratio when it is determined that the first blink movement and the second blink movement together form a specific blink movement.

In a third embodiment, in response to determining that each of the first eye and the second eye blinked a second predetermined number of times within a second predetermined duration, the processor 104 may determine the first blink motion and the second blink motion. The blinking movements together form a specific blinking movement. In one embodiment, the second predetermined number of times is two and the second predetermined duration is one second. In this case, if the processor 104 determines that each of the first eye and the second eye blinked twice within one second, the processor 104 may determine that the first blink motion and the second blink motion are common. Create a specific eye blinking movement. Similar to the principle mentioned above, if it is determined that the first eye and the second eye blink twice within one second, then it means that the user wants to initiate a specific operation by using the first eye and the second eye. (e.g., scaling visual content to have a predetermined magnification).

In a third embodiment, in response to determining that the first eye and the second eye have been closed for a second predetermined length of time, the processor 104 determines that the first blink movement and the second blink movement together form a specific blink movement. In one embodiment, the second predetermined length of time is two seconds.

In a third embodiment, in response to determining that the first blink movement matches the first predetermined blink movement and the second blink movement matches the second predetermined blink movement, processor 104 may determine that the first blink movement and the second blink movement together form a specific blink. sports.

In a first variation of the third embodiment, if the processor 104 determines that both the first eye and the second eye blink twice within one second, the processor 104 may determine that the first blink motion matches the second eye blink. A predetermined blink movement, and a second blink movement matches the second predetermined blink movement. Thereby, the processor 104 can determine that the first blink movement and the second blink movement together form a specific blink movement, and accordingly zoom the visual content to have a predetermined magnification ratio.

In a second variation of the third embodiment, if the processor 104 determines that both the first eye and the second eye have been closed for two seconds, the processor 104 may determine that the first blink motion matches the first predetermined blink. movement, and the second blink movement matches the second predetermined blink movement. Thereby, the processor 104 can determine that the first blink movement and the second blink movement jointly form a specific blink movement, and accordingly zoom the visual content to have a predetermined magnification ratio.

In different embodiments, processor 104 may amplify visual content in different ways.

Referring to FIG. 3A, FIG. 3A shows a schematic diagram of amplifying visual content according to an embodiment of the present invention. In FIG. 3A , the host 100 provides visual content, and a user of the host 100 can see a part of the visual content through a field of view (FOV) 310 . In an embodiment, the processor 104 may magnify the visual content by a first magnification factor (hereinafter referred to as P). To better understand the concept of the present invention, it is assumed in the following that the first magnification ratio is 2, but the present invention is not limited thereto.

In Figure 3A, the processor 104 determines a first reference area 320 within the FOV 310 of the visual content based on the first magnification. In an embodiment, the first reference area 320 has a center 320a, a width, and a height, and the center 320a of the first reference area 320 may correspond to the center 310a of the FOV 310. Furthermore, the width of the first reference area 320 is characterized by , the height of the first reference area 320 is characterized by , where W is the width of FOV 310 and H is the height of FOV 310. In an embodiment assuming that P is 2, the width of the first reference area 320 will be W/2, and the height of the first reference area 320 will be H/2.

Thereafter, processor 104 may expand first reference area 320 to fit FOV 310, as shown on the right side of Figure 3A.

Referring to FIG. 3B, FIG. 3B shows a schematic diagram of amplifying visual content according to an embodiment of the present invention. In FIG. 3B , the host 100 provides visual content, and a user of the host 100 can see a portion of the visual content through the FOV 310 . In embodiments, the processor 104 may magnify the visual content by a first magnification factor (ie, P).

In Figure 3B, the processor 104 determines a first reference area 320 within the FOV 310 of the visual content based on the first magnification. In an embodiment, the first reference area 320 has a center 320a, a width, and a height. The center 320a of the first reference area 320 may correspond to the user's gaze point 399 in the FOV 310. Furthermore, the width of the first reference area 320 is characterized by , the height of the first reference area 320 is characterized by , where W is the width of FOV 310 and H is the height of FOV 310. In an embodiment assuming that P is 2, the width of the first reference area 320 will be W/2, and the height of the first reference area 320 will be H/2.

Thereafter, processor 104 may expand first reference area 320 to fit FOV 310, as shown on the right side of Figure 3B.

In one embodiment, after the processor 104 magnifies the visual content by a first magnification factor, the processor 104 may further magnify the visual content by a second magnification factor in response to determining that the first blink motion again matches the first predetermined blink motion. In various embodiments, the second magnification ratio may or may not be equal to the first magnification ratio, and the related operations of enlarging the visual content to the second magnification ratio may refer to the above teachings, which will not be described again herein.

In different embodiments, processor 104 may shrink visual content in different ways.

Referring to FIG. 4A, FIG. 4A shows a schematic diagram of reducing visual content according to an embodiment of the present invention. In FIG. 4A , the host 100 provides visual content, and a user of the host 100 can see a portion of the visual content through the FOV 410 . In embodiments, the processor 104 may reduce the visual content by a first magnification factor (ie, P).

In Figure 4A, the processor 104 determines a second reference area 420 in the visual content based on the first magnification. In an embodiment, the second reference area 420 has a center 420a, a width, and a height, and the center 420a of the second reference area 420 may correspond to the center 410a of the FOV 410. Furthermore, the width of the second reference area 420 is characterized as , the height of the second reference area 420 is characterized by , where W is the width of the FOV 410 and H is the height of the FOV 410. In an embodiment assuming that P is 2, the width of the second reference area 420 will be 2W, and the height of the second reference area 420 will be 2H.

Thereafter, processor 104 may shrink second reference area 420 to fit FOV 410, as shown on the right side of Figure 4A.

Referring to FIG. 4B, FIG. 4B shows a schematic diagram of reducing visual content according to an embodiment of the present invention. In FIG. 4B , the host 100 provides visual content, and a user of the host 100 can see a portion of the visual content through the FOV 410 . In embodiments, the processor 104 may reduce the visual content by a first magnification factor (ie, P).

In Figure 4B, the processor 104 determines a second reference area 420 in the visual content based on the first magnification. In an embodiment, the second reference area 420 has a center 420a, a width, and a height. The center 420a of the second reference area 420 may correspond to the user's gaze point 499 in the FOV 410. Furthermore, the width of the second reference area 420 is characterized as , the height of the second reference area 420 is characterized by , where W is the width of the FOV 410 and H is the height of the FOV 410. In an embodiment assuming that P is 2, the width of the second reference area 420 will be 2W, and the height of the second reference area 420 will be 2H.

Thereafter, processor 104 may expand second reference area 420 to fit FOV 410, as shown on the right side of Figure 4B.

In one embodiment, after the processor 104 reduces the visual content by a first magnification factor, the processor 104 may further reduce the visual content by a second magnification factor in response to determining that the second blink motion again matches the second predetermined blink motion. In various embodiments, the second magnification ratio may or may not be equal to the first magnification ratio, and the related operations of reducing the visual content to the second magnification ratio may refer to the above teachings, which will not be described again herein.

In various embodiments, the first magnification ratio and/or the second magnification ratio may be predetermined or defined by the user.

Referring to Figure 5, Figure 5 shows a schematic diagram of zooming visual content according to the first embodiment of the present invention. In Figure 5, the predetermined magnification ratio can be determined by the state " 1" indicates. In this case, when the processor 104 determines that the first eye blinked 2 times/second, the processor 104 can amplify the visual content by a magnification ratio accordingly, and the amplified visual content can be, for example, Twice the scheduled magnification (determined by status " 2" indicates).

In one embodiment, if the processor 104 determines that the second eye is in state " 2" blinks 2 times/second, then the processor 104 can reduce the visual content by the magnification ratio, and the reduced visual content can return to the state " 1", but the present invention is not limited thereto.

In one embodiment, when the processor 104 determines that the first eye is in state " When blinking 2 times/second under 2", the processor 104 can amplify the visual content according to the magnification rate, and the amplified visual content can be, for example, three times the predetermined magnification rate (as determined by the state " 3" indicates).

In one embodiment, when the processor 104 determines that the first eye and the second eye are in the state " 2" or " When blinking 2 times/second at 3", the processor 104 can adjust the visual content to have a predetermined magnification, that is, state " 1".

In other embodiments, the visual content may be further magnified to four times the predetermined magnification (as determined by the status " 4") and/or five times the predetermined magnification (indicated by the status " 5" indicates) and so on, but the present invention is not limited thereto.

In various embodiments, the amplification ratio corresponding to each state may be user-defined. For example, the status " 2"Available status" 3" instead, and the status " 3"Available status" 5" instead, but the invention is not limited thereto.

Referring to Figure 6, Figure 6 shows a schematic diagram of zooming visual content according to a second embodiment of the present invention. In Figure 6, the predetermined magnification ratio can be determined by the state " 1" indicates. In this case, when the processor 104 determines that the first eye has been closed for 2 seconds, the processor 104 can magnify the visual content by a magnification ratio accordingly, and the magnified visual content can be, for example, a predetermined 1.5x magnification (by status " 1.5" indicates).

In one embodiment, if the processor 104 determines that the second eye is already in state " 1.5" is closed for 2 seconds, then the processor 104 can reduce the visual content by the magnification ratio, and the reduced visual content can return to the state " 1", but the present invention is not limited thereto.

In one embodiment, when the processor 104 determines that the first eye is in state " 1.5" is closed for 2 seconds, the processor 104 may amplify the visual content accordingly to the magnification rate, and the amplified visual content may be, for example, twice the predetermined magnification rate (as determined by the state " 2" indicates).

In one embodiment, when the processor 104 determines that the first eye and the second eye are in the state " 1.5" or " 2" is closed for 2 seconds, the processor 104 may adjust the visual content to have a predetermined magnification, ie, state " 1".

In other embodiments, the visual content may be further magnified to 2.5x the predetermined magnification (as determined by the status " 2.5") and/or three times the predetermined magnification (indicated by the status " 3" indicates) and so on, but the present invention is not limited thereto.

In various embodiments, the amplification ratio corresponding to each state may be user-defined. For example, the status " 1.5 "Available Status" 3" instead, and the status " 2"Available status" 5" instead, but the invention is not limited thereto.

The present invention further provides a computer-readable storage medium for performing a method for scaling visual content. This computer-readable storage medium consists of a plurality of program instructions (such as setup and deployment program instructions). These program instructions can be loaded into the host 100 and executed to perform the above-mentioned method for scaling visual content and the functions of the host 100 .

In summary, embodiments of the present invention can zoom visual content based on the blinking motion of the user's first eye and second eye. This allows users to zoom in and out of visual content in an easier and more intuitive way.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, The protection scope of the present invention shall be determined by the appended patent application scope.

100:Host 102:Storage circuit 104: Processor 310, 410:View 310a, 320a, 410a, 420a: Center 320: First reference area 399, 499: fixation point 420: Second reference area S210, S220, S230: steps H: height P: first magnification W: Width

Figure 1 shows a schematic diagram of a host according to an embodiment of the present invention. Figure 2 shows a flowchart of a method for scaling visual content according to an embodiment of the present invention. FIG. 3A shows a schematic diagram of amplifying visual content according to an embodiment of the present invention. Figure 3B shows a schematic diagram of amplifying visual content according to an embodiment of the present invention. FIG. 4A shows a schematic diagram of reducing visual content according to an embodiment of the present invention. FIG. 4B shows a schematic diagram of reducing visual content according to an embodiment of the present invention. Figure 5 shows a schematic diagram of zooming visual content according to the first embodiment of the present invention. Figure 6 shows a schematic diagram of scaling visual content according to a second embodiment of the present invention.

S210~S230: steps

Claims (19)

A method for zooming visual content suitable for a host, including: detecting a first blink movement of a user's first eye and detecting a second blink movement of the user's second eye; reacting to determining the first blink movement The blink movement matches the first predetermined blink movement but the second blink movement does not match the second predetermined blink movement, amplifying the visual content; and in response to determining that the second blink movement matches the second predetermined blink movement but the first blink movement does not Matching the first predetermined blink movement, zooming out the visual content, wherein the visual content has a predetermined magnification ratio; in response to determining that the first blink movement and the second blink movement jointly form a specific blink movement, zooming the visual content back to the predetermined blink movement magnification. The method of claim 1, wherein the first predetermined blink movement is the same as the second predetermined blink movement. The method of claim 1, including: in response to determining that the first eye blinks a first predetermined number of times within a first predetermined duration, determining that the first blink movement matches the first predetermined blink movement. The method of claim 3, wherein the first predetermined number of times is two times, and the first predetermined duration is one second. The method of claim 1, including: in response to determining that the first eye has been closed for a first predetermined length of time, determining that the first blink movement matches the first predetermined blink movement. The method of claim 5, wherein the first predetermined length of time is two seconds. The method of claim 1, comprising: in response to determining that each of the first eye and the second eye blinks a second predetermined number of times within a second predetermined duration, determining the first blink movement Together with the second blinking movement, the specific blinking movement is formed. The method of claim 7, wherein the second predetermined number of times is two times, and the second predetermined duration is one second. The method of claim 1, including: in response to determining that the first eye and the second eye have been closed for a second predetermined length of time, determining that the first blink movement and the second blink movement together form the specific Blinking movement. The method of claim 9, wherein the second predetermined time length is two seconds. The method of claim 1, wherein the step of amplifying the visual content includes: amplifying the visual content by a first magnification ratio. The method of claim 11, wherein the step of amplifying the visual content by the first magnification ratio includes: determining a first reference area within the field of view of the visual content based on the first magnification ratio; expanding the first reference area to fit the field of view. The method of claim 12, wherein the first reference area has a center, a width and a height, the center of the first reference area corresponds to the center of the field of view or the user's gaze point in the field of view, and the first This width of the reference area is characterized as

, the height of the first reference area is characterized by

, where W is the width of the field of view, H is the height of the field of view, and P is the first magnification. The method of claim 11, wherein after the step of magnifying the visual content by the first magnification ratio, the method further includes: in response to determining that the first blink movement again matches the first predetermined blink movement, to The second magnification magnifies the visual content. The method of claim 11, wherein the step of reducing the visual content includes: reducing the visual content by the first magnification ratio. The method of claim 15, wherein the step of reducing the visual content by the first magnification ratio includes: determining a second reference area in the visual content based on the first magnification ratio; and reducing the second reference area to Adapt to this field of view. The method of claim 16, wherein the second reference area has a center, a width and a height, the center of the second reference area corresponds to the center of the field of view or the gaze point of the user in the field of view, and the second reference area has a center, a width and a height. The width of the reference area is characterized as W × P and the height of the second reference area is characterized as H × P , where W is the width of the field of view, H is the height of the field of view, and P is the first magnification . A host that includes: The storage circuit stores the program code; the processor is coupled to the storage circuit and accesses the program code to perform: detecting the first blink movement of the user's first eye and detecting the second blink movement of the user's second eye. two blink movements; in response to determining that the first blink movement matches the first predetermined blink movement but that the second blink movement does not match the second predetermined blink movement, amplifying the visual content; and in response to determining that the second blink movement matches the second blink movement a predetermined blink movement but the first blink movement does not match the first predetermined blink movement, reducing the visual content, wherein the visual content has a predetermined magnification; in response to determining that the first blink movement and the second blink movement together form a specific blink movement Movement to scale the visual content to have the predetermined magnification. A computer-readable storage medium records an executable computer program. The executable computer program is loaded by a host to perform the following steps: detect the first blink movement of the user's first eye and detect the a second blink movement of the user's second eye; in response to determining that the first blink movement matches the first predetermined blink movement but that the second blink movement does not match the second predetermined blink movement, amplifying the visual content; and in response to determining that the first blink movement matches the first predetermined blink movement but the second blink movement does not match the second predetermined blink movement. The second blink movement matches the second predetermined blink movement but the first blink movement does not match the first predetermined blink movement, shrinking the visual content, wherein the visual content has a predetermined magnification; in response to determining the first blink movement and the first blink movement The second blink movements together form a specific blink movement that scales the visual content to have the predetermined magnification.

Images